./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:01:52,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:01:52,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:01:52,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:01:52,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:01:52,456 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:01:52,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:01:52,457 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:01:52,458 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:01:52,462 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:01:52,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:01:52,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:01:52,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:01:52,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:01:52,465 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:01:52,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:01:52,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:01:52,466 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:01:52,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:01:52,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:01:52,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:01:52,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:01:52,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:01:52,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:01:52,468 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:01:52,468 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:01:52,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:01:52,468 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:01:52,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:01:52,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:01:52,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:01:52,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:01:52,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:01:52,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:01:52,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:01:52,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:01:52,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:01:52,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:01:52,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:01:52,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:01:52,473 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:01:52,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:01:52,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:01:52,473 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:01:52,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:01:52,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:01:52,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:01:52,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:01:52,776 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:01:52,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-31 16:01:53,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:01:54,233 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:01:54,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i [2024-01-31 16:01:54,259 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9827530/54e5bd5663e34f328e476089b812e596/FLAG2cb685bfa [2024-01-31 16:01:54,273 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9827530/54e5bd5663e34f328e476089b812e596 [2024-01-31 16:01:54,275 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:01:54,276 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:01:54,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/31_simple_loop5_vs-pthread.yml/witness.yml [2024-01-31 16:01:54,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:01:54,433 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:01:54,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:01:54,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:01:54,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:01:54,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:01:54" (1/2) ... [2024-01-31 16:01:54,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3deeab5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:01:54, skipping insertion in model container [2024-01-31 16:01:54,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:01:54" (1/2) ... [2024-01-31 16:01:54,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b2b536b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:01:54, skipping insertion in model container [2024-01-31 16:01:54,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:54" (2/2) ... [2024-01-31 16:01:54,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3deeab5b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:54, skipping insertion in model container [2024-01-31 16:01:54,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:54" (2/2) ... [2024-01-31 16:01:54,443 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:01:54,580 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:01:54,581 INFO L98 nessWitnessExtractor]: Location invariant before [L693-L693] (unsigned long )arg == 0UL [2024-01-31 16:01:54,581 INFO L98 nessWitnessExtractor]: Loop invariant at [L693-L693] (unsigned long )arg == 0UL [2024-01-31 16:01:54,581 INFO L98 nessWitnessExtractor]: Location invariant before [L697-L697] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-01-31 16:01:54,582 INFO L98 nessWitnessExtractor]: Location invariant before [L695-L695] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-01-31 16:01:54,582 INFO L98 nessWitnessExtractor]: Location invariant before [L708-L708] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L714-L714] (((a == 1) && (b == 2)) && (c == 3)) && (temp == 0) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L694-L694] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L696-L696] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L698-L698] ((((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (1 <= temp)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 3)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && (temp != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && ((temp == 1 || temp == 2) || temp == 3) [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Loop invariant at [L704-L704] (unsigned long )arg == 0UL [2024-01-31 16:01:54,583 INFO L98 nessWitnessExtractor]: Location invariant before [L706-L706] (unsigned long )arg == 0UL [2024-01-31 16:01:54,584 INFO L98 nessWitnessExtractor]: Location invariant after [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-31 16:01:54,584 INFO L98 nessWitnessExtractor]: Location invariant before [L707-L707] ((((((((((((((((((((((0 <= a) && (0 <= b)) && (0 <= c)) && (0 <= temp)) && (1 <= a)) && (1 <= b)) && (1 <= c)) && (a <= 3)) && (a <= 127)) && (b <= 3)) && (b <= 127)) && (c <= 3)) && (c <= 127)) && (temp <= 4)) && (temp <= 127)) && ((unsigned long )arg == 0UL)) && (a != 0)) && (b != 0)) && (c != 0)) && ((a == 1 || a == 2) || a == 3)) && ((b == 1 || b == 2) || b == 3)) && ((c == 1 || c == 2) || c == 3)) && (((temp == 0 || temp == 1) || temp == 2) || temp == 3) [2024-01-31 16:01:54,622 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:01:54,926 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] [2024-01-31 16:01:54,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:01:54,947 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:01:55,046 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs-pthread.i[30648,30661] Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:01:55,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:01:55,155 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:01:55,156 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55 WrapperNode [2024-01-31 16:01:55,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:01:55,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:01:55,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:01:55,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:01:55,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,239 INFO L138 Inliner]: procedures = 163, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-01-31 16:01:55,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:01:55,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:01:55,254 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:01:55,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:01:55,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,269 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,290 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-01-31 16:01:55,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:01:55,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:01:55,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:01:55,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:01:55,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (1/1) ... [2024-01-31 16:01:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:01:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:01:55,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:01:55,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:01:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-01-31 16:01:55,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-01-31 16:01:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:01:55,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:01:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:01:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:01:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:01:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 16:01:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:01:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:01:55,433 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:01:55,554 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:01:55,556 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:01:55,790 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:01:55,790 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:01:55,834 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:01:55,834 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:01:55,834 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:01:55 BoogieIcfgContainer [2024-01-31 16:01:55,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:01:55,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:01:55,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:01:55,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:01:55,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:01:54" (1/4) ... [2024-01-31 16:01:55,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d482637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:01:55, skipping insertion in model container [2024-01-31 16:01:55,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:01:54" (2/4) ... [2024-01-31 16:01:55,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d482637 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:01:55, skipping insertion in model container [2024-01-31 16:01:55,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:01:55" (3/4) ... [2024-01-31 16:01:55,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d482637 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:01:55, skipping insertion in model container [2024-01-31 16:01:55,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:01:55" (4/4) ... [2024-01-31 16:01:55,841 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs-pthread.i [2024-01-31 16:01:55,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:01:55,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-01-31 16:01:55,856 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:01:55,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:01:55,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 118 flow [2024-01-31 16:01:55,961 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2024-01-31 16:01:55,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:55,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 56 events. 4/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-01-31 16:01:55,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 118 flow [2024-01-31 16:01:55,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 54 transitions, 115 flow [2024-01-31 16:01:55,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:01:55,984 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e0000ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:01:55,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-31 16:01:55,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:01:55,987 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:01:55,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:55,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:55,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:01:55,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:01:55,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash 7733, now seen corresponding path program 1 times [2024-01-31 16:01:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843005176] [2024-01-31 16:01:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843005176] [2024-01-31 16:01:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843005176] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:56,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:01:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618078958] [2024-01-31 16:01:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:01:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:01:56,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:01:56,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2024-01-31 16:01:56,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:56,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:56,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2024-01-31 16:01:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:56,554 INFO L124 PetriNetUnfolderBase]: 151/477 cut-off events. [2024-01-31 16:01:56,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:56,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 477 events. 151/477 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2916 event pairs, 40 based on Foata normal form. 108/517 useless extension candidates. Maximal degree in co-relation 740. Up to 213 conditions per place. [2024-01-31 16:01:56,559 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 21 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-01-31 16:01:56,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 159 flow [2024-01-31 16:01:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:01:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:01:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-01-31 16:01:56,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7696969696969697 [2024-01-31 16:01:56,570 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 115 flow. Second operand 3 states and 127 transitions. [2024-01-31 16:01:56,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 159 flow [2024-01-31 16:01:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:56,574 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 112 flow [2024-01-31 16:01:56,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-01-31 16:01:56,577 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-01-31 16:01:56,578 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 112 flow [2024-01-31 16:01:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:56,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:56,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:01:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:01:56,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:01:56,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash 230687754, now seen corresponding path program 1 times [2024-01-31 16:01:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:56,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390536748] [2024-01-31 16:01:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:56,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:56,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:56,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390536748] [2024-01-31 16:01:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390536748] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:56,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:56,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848132111] [2024-01-31 16:01:56,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:56,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:01:56,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:01:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:01:56,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 55 [2024-01-31 16:01:56,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:56,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:56,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 55 [2024-01-31 16:01:56,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:56,797 INFO L124 PetriNetUnfolderBase]: 155/514 cut-off events. [2024-01-31 16:01:56,797 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 16:01:56,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 514 events. 155/514 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2914 event pairs, 56 based on Foata normal form. 54/507 useless extension candidates. Maximal degree in co-relation 817. Up to 213 conditions per place. [2024-01-31 16:01:56,803 INFO L140 encePairwiseOnDemand]: 51/55 looper letters, 26 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-01-31 16:01:56,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 194 flow [2024-01-31 16:01:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:01:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:01:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-01-31 16:01:56,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6909090909090909 [2024-01-31 16:01:56,816 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 112 flow. Second operand 4 states and 152 transitions. [2024-01-31 16:01:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 194 flow [2024-01-31 16:01:56,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:56,819 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 110 flow [2024-01-31 16:01:56,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-01-31 16:01:56,820 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2024-01-31 16:01:56,820 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 110 flow [2024-01-31 16:01:56,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:56,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:56,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:56,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:01:56,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:01:56,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 289546038, now seen corresponding path program 1 times [2024-01-31 16:01:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:56,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444926578] [2024-01-31 16:01:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:01:56,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:01:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:01:56,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:01:56,864 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:01:56,865 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2024-01-31 16:01:56,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-01-31 16:01:56,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-01-31 16:01:56,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-01-31 16:01:56,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-01-31 16:01:56,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-01-31 16:01:56,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 29 remaining) [2024-01-31 16:01:56,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-01-31 16:01:56,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (15 of 29 remaining) [2024-01-31 16:01:56,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-01-31 16:01:56,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-01-31 16:01:56,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 29 remaining) [2024-01-31 16:01:56,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-01-31 16:01:56,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (0 of 29 remaining) [2024-01-31 16:01:56,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:01:56,871 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-01-31 16:01:56,873 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:01:56,873 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:01:56,925 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:01:56,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 101 transitions, 222 flow [2024-01-31 16:01:56,941 INFO L124 PetriNetUnfolderBase]: 5/81 cut-off events. [2024-01-31 16:01:56,941 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:01:56,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 81 events. 5/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 235 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 88. Up to 3 conditions per place. [2024-01-31 16:01:56,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 101 transitions, 222 flow [2024-01-31 16:01:56,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 165 flow [2024-01-31 16:01:56,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:01:56,956 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e0000ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:01:56,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-01-31 16:01:56,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:01:56,957 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:01:56,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:01:56,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:56,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:01:56,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:01:56,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash 10965, now seen corresponding path program 1 times [2024-01-31 16:01:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911734209] [2024-01-31 16:01:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911734209] [2024-01-31 16:01:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911734209] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:57,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:57,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:01:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021577176] [2024-01-31 16:01:57,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:01:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:01:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:01:57,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 101 [2024-01-31 16:01:57,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:57,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:57,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 101 [2024-01-31 16:01:57,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:57,861 INFO L124 PetriNetUnfolderBase]: 2096/4630 cut-off events. [2024-01-31 16:01:57,861 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-01-31 16:01:57,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 4630 events. 2096/4630 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39189 event pairs, 631 based on Foata normal form. 1092/5294 useless extension candidates. Maximal degree in co-relation 7732. Up to 2860 conditions per place. [2024-01-31 16:01:57,895 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 31 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-01-31 16:01:57,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 240 flow [2024-01-31 16:01:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:01:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:01:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2024-01-31 16:01:57,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7491749174917491 [2024-01-31 16:01:57,897 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 165 flow. Second operand 3 states and 227 transitions. [2024-01-31 16:01:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 240 flow [2024-01-31 16:01:57,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:57,899 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 167 flow [2024-01-31 16:01:57,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-01-31 16:01:57,900 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -4 predicate places. [2024-01-31 16:01:57,900 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 167 flow [2024-01-31 16:01:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:57,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:57,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:01:57,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:01:57,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:01:57,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 327116476, now seen corresponding path program 1 times [2024-01-31 16:01:57,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:57,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051020339] [2024-01-31 16:01:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:57,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:57,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051020339] [2024-01-31 16:01:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051020339] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:57,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:57,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319055020] [2024-01-31 16:01:57,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:57,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:01:57,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:01:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:01:57,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-01-31 16:01:57,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:57,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:57,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-01-31 16:01:57,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:58,415 INFO L124 PetriNetUnfolderBase]: 1910/4675 cut-off events. [2024-01-31 16:01:58,415 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-01-31 16:01:58,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7917 conditions, 4675 events. 1910/4675 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 39669 event pairs, 921 based on Foata normal form. 366/4449 useless extension candidates. Maximal degree in co-relation 7902. Up to 2267 conditions per place. [2024-01-31 16:01:58,453 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 42 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-01-31 16:01:58,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 307 flow [2024-01-31 16:01:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:01:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:01:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2024-01-31 16:01:58,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7178217821782178 [2024-01-31 16:01:58,455 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 167 flow. Second operand 4 states and 290 transitions. [2024-01-31 16:01:58,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 307 flow [2024-01-31 16:01:58,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:01:58,458 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 164 flow [2024-01-31 16:01:58,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2024-01-31 16:01:58,460 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -4 predicate places. [2024-01-31 16:01:58,460 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 164 flow [2024-01-31 16:01:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:58,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:58,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:58,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:01:58,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:01:58,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:58,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1771280481, now seen corresponding path program 1 times [2024-01-31 16:01:58,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:58,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942849547] [2024-01-31 16:01:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:58,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:58,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942849547] [2024-01-31 16:01:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942849547] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:58,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:01:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258546077] [2024-01-31 16:01:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:01:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:01:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:01:58,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-01-31 16:01:58,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:58,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:58,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-01-31 16:01:58,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:01:59,032 INFO L124 PetriNetUnfolderBase]: 1618/4037 cut-off events. [2024-01-31 16:01:59,032 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-01-31 16:01:59,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6783 conditions, 4037 events. 1618/4037 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 34719 event pairs, 310 based on Foata normal form. 320/3989 useless extension candidates. Maximal degree in co-relation 6767. Up to 2130 conditions per place. [2024-01-31 16:01:59,053 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 38 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-01-31 16:01:59,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 279 flow [2024-01-31 16:01:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:01:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:01:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-01-31 16:01:59,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7103960396039604 [2024-01-31 16:01:59,055 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 164 flow. Second operand 4 states and 287 transitions. [2024-01-31 16:01:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 279 flow [2024-01-31 16:01:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:01:59,056 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 161 flow [2024-01-31 16:01:59,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-01-31 16:01:59,057 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -5 predicate places. [2024-01-31 16:01:59,057 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 161 flow [2024-01-31 16:01:59,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:59,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:01:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:01:59,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:01:59,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:01:59,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:01:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1429760855, now seen corresponding path program 1 times [2024-01-31 16:01:59,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:01:59,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963350888] [2024-01-31 16:01:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:01:59,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:01:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:01:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:01:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:01:59,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963350888] [2024-01-31 16:01:59,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963350888] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:01:59,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:01:59,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:01:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100913701] [2024-01-31 16:01:59,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:01:59,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:01:59,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:01:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:01:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:01:59,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 101 [2024-01-31 16:01:59,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:01:59,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:01:59,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 101 [2024-01-31 16:01:59,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:00,789 INFO L124 PetriNetUnfolderBase]: 7475/14333 cut-off events. [2024-01-31 16:02:00,789 INFO L125 PetriNetUnfolderBase]: For 1208/1208 co-relation queries the response was YES. [2024-01-31 16:02:00,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26288 conditions, 14333 events. 7475/14333 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 121362 event pairs, 2189 based on Foata normal form. 0/12938 useless extension candidates. Maximal degree in co-relation 26273. Up to 9949 conditions per place. [2024-01-31 16:02:00,873 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 52 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-01-31 16:02:00,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 88 transitions, 341 flow [2024-01-31 16:02:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 256 transitions. [2024-01-31 16:02:00,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336633663366337 [2024-01-31 16:02:00,875 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 161 flow. Second operand 4 states and 256 transitions. [2024-01-31 16:02:00,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 88 transitions, 341 flow [2024-01-31 16:02:00,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:00,878 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 193 flow [2024-01-31 16:02:00,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-01-31 16:02:00,879 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -2 predicate places. [2024-01-31 16:02:00,879 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 193 flow [2024-01-31 16:02:00,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:00,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:00,879 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:00,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:02:00,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-01-31 16:02:00,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1706070103, now seen corresponding path program 1 times [2024-01-31 16:02:00,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:00,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558686540] [2024-01-31 16:02:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:00,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:00,890 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:02:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:02:00,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:02:00,907 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:02:00,907 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2024-01-31 16:02:00,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (40 of 42 remaining) [2024-01-31 16:02:00,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (39 of 42 remaining) [2024-01-31 16:02:00,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (38 of 42 remaining) [2024-01-31 16:02:00,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (37 of 42 remaining) [2024-01-31 16:02:00,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (36 of 42 remaining) [2024-01-31 16:02:00,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (35 of 42 remaining) [2024-01-31 16:02:00,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (34 of 42 remaining) [2024-01-31 16:02:00,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 42 remaining) [2024-01-31 16:02:00,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 42 remaining) [2024-01-31 16:02:00,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 42 remaining) [2024-01-31 16:02:00,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (28 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (26 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 42 remaining) [2024-01-31 16:02:00,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 42 remaining) [2024-01-31 16:02:00,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 42 remaining) [2024-01-31 16:02:00,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 42 remaining) [2024-01-31 16:02:00,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 42 remaining) [2024-01-31 16:02:00,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 42 remaining) [2024-01-31 16:02:00,926 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 42 remaining) [2024-01-31 16:02:00,927 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 42 remaining) [2024-01-31 16:02:00,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 42 remaining) [2024-01-31 16:02:00,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 42 remaining) [2024-01-31 16:02:00,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 42 remaining) [2024-01-31 16:02:00,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 42 remaining) [2024-01-31 16:02:00,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 42 remaining) [2024-01-31 16:02:00,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 42 remaining) [2024-01-31 16:02:00,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (6 of 42 remaining) [2024-01-31 16:02:00,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 42 remaining) [2024-01-31 16:02:00,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 42 remaining) [2024-01-31 16:02:00,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 42 remaining) [2024-01-31 16:02:00,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 42 remaining) [2024-01-31 16:02:00,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 42 remaining) [2024-01-31 16:02:00,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONERROR_FUNCTION (0 of 42 remaining) [2024-01-31 16:02:00,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:02:00,931 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-01-31 16:02:00,932 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:02:00,932 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:02:01,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:02:01,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 147 transitions, 330 flow [2024-01-31 16:02:01,059 INFO L124 PetriNetUnfolderBase]: 6/106 cut-off events. [2024-01-31 16:02:01,059 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:02:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 106 events. 6/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 353 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 117. Up to 4 conditions per place. [2024-01-31 16:02:01,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 147 transitions, 330 flow [2024-01-31 16:02:01,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 98 transitions, 217 flow [2024-01-31 16:02:01,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:02:01,062 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e0000ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:02:01,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-01-31 16:02:01,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:02:01,065 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:02:01,065 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:02:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:02:01,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:01,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 15669, now seen corresponding path program 1 times [2024-01-31 16:02:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995939652] [2024-01-31 16:02:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:01,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:01,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995939652] [2024-01-31 16:02:01,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995939652] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:01,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:01,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:02:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759853077] [2024-01-31 16:02:01,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:01,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:02:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:02:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:02:01,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 147 [2024-01-31 16:02:01,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:01,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:01,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 147 [2024-01-31 16:02:01,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:05,517 INFO L124 PetriNetUnfolderBase]: 23551/42849 cut-off events. [2024-01-31 16:02:05,517 INFO L125 PetriNetUnfolderBase]: For 1710/1710 co-relation queries the response was YES. [2024-01-31 16:02:05,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74680 conditions, 42849 events. 23551/42849 cut-off events. For 1710/1710 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 417965 event pairs, 9184 based on Foata normal form. 10405/50293 useless extension candidates. Maximal degree in co-relation 74666. Up to 30303 conditions per place. [2024-01-31 16:02:05,858 INFO L140 encePairwiseOnDemand]: 134/147 looper letters, 41 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2024-01-31 16:02:05,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 325 flow [2024-01-31 16:02:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:02:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:02:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2024-01-31 16:02:05,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7414965986394558 [2024-01-31 16:02:05,860 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 217 flow. Second operand 3 states and 327 transitions. [2024-01-31 16:02:05,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 325 flow [2024-01-31 16:02:05,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:05,864 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 222 flow [2024-01-31 16:02:05,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2024-01-31 16:02:05,865 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-01-31 16:02:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 222 flow [2024-01-31 16:02:05,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:05,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:05,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-31 16:02:05,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:02:05,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:05,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 467443964, now seen corresponding path program 1 times [2024-01-31 16:02:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:05,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098592516] [2024-01-31 16:02:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:05,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098592516] [2024-01-31 16:02:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098592516] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874409647] [2024-01-31 16:02:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:05,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-01-31 16:02:05,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:05,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:05,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-01-31 16:02:05,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:10,342 INFO L124 PetriNetUnfolderBase]: 19362/39182 cut-off events. [2024-01-31 16:02:10,342 INFO L125 PetriNetUnfolderBase]: For 3749/3749 co-relation queries the response was YES. [2024-01-31 16:02:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68668 conditions, 39182 events. 19362/39182 cut-off events. For 3749/3749 co-relation queries the response was YES. Maximal size of possible extension queue 1650. Compared 410360 event pairs, 11069 based on Foata normal form. 2466/36921 useless extension candidates. Maximal degree in co-relation 68652. Up to 20920 conditions per place. [2024-01-31 16:02:10,694 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 58 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-01-31 16:02:10,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 117 transitions, 420 flow [2024-01-31 16:02:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2024-01-31 16:02:10,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-01-31 16:02:10,696 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 222 flow. Second operand 4 states and 428 transitions. [2024-01-31 16:02:10,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 117 transitions, 420 flow [2024-01-31 16:02:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 117 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:02:10,700 INFO L231 Difference]: Finished difference. Result has 97 places, 90 transitions, 218 flow [2024-01-31 16:02:10,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2024-01-31 16:02:10,703 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-01-31 16:02:10,703 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 218 flow [2024-01-31 16:02:10,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:10,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:10,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:10,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:02:10,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:10,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -484366144, now seen corresponding path program 1 times [2024-01-31 16:02:10,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:10,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735835789] [2024-01-31 16:02:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735835789] [2024-01-31 16:02:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735835789] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:10,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:10,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114688504] [2024-01-31 16:02:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:10,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:10,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-01-31 16:02:10,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:10,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:10,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-01-31 16:02:10,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:14,319 INFO L124 PetriNetUnfolderBase]: 16922/34924 cut-off events. [2024-01-31 16:02:14,319 INFO L125 PetriNetUnfolderBase]: For 3264/3264 co-relation queries the response was YES. [2024-01-31 16:02:14,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60771 conditions, 34924 events. 16922/34924 cut-off events. For 3264/3264 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 372229 event pairs, 4955 based on Foata normal form. 2476/33981 useless extension candidates. Maximal degree in co-relation 60754. Up to 19986 conditions per place. [2024-01-31 16:02:14,582 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 54 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-01-31 16:02:14,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 390 flow [2024-01-31 16:02:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2024-01-31 16:02:14,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7227891156462585 [2024-01-31 16:02:14,584 INFO L175 Difference]: Start difference. First operand has 97 places, 90 transitions, 218 flow. Second operand 4 states and 425 transitions. [2024-01-31 16:02:14,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 390 flow [2024-01-31 16:02:14,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:14,586 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 215 flow [2024-01-31 16:02:14,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-01-31 16:02:14,587 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-01-31 16:02:14,587 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 215 flow [2024-01-31 16:02:14,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:14,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:14,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:02:14,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:14,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash -978189464, now seen corresponding path program 1 times [2024-01-31 16:02:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:14,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098132901] [2024-01-31 16:02:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098132901] [2024-01-31 16:02:14,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098132901] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:14,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:14,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866218891] [2024-01-31 16:02:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:14,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:14,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 147 [2024-01-31 16:02:14,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:14,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:14,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 147 [2024-01-31 16:02:14,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:28,833 INFO L124 PetriNetUnfolderBase]: 82103/141314 cut-off events. [2024-01-31 16:02:28,834 INFO L125 PetriNetUnfolderBase]: For 11672/11672 co-relation queries the response was YES. [2024-01-31 16:02:29,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261438 conditions, 141314 events. 82103/141314 cut-off events. For 11672/11672 co-relation queries the response was YES. Maximal size of possible extension queue 4833. Compared 1431837 event pairs, 32226 based on Foata normal form. 0/128106 useless extension candidates. Maximal degree in co-relation 261422. Up to 104058 conditions per place. [2024-01-31 16:02:29,935 INFO L140 encePairwiseOnDemand]: 140/147 looper letters, 64 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-01-31 16:02:29,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 445 flow [2024-01-31 16:02:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2024-01-31 16:02:29,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-01-31 16:02:29,938 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 215 flow. Second operand 4 states and 386 transitions. [2024-01-31 16:02:29,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 445 flow [2024-01-31 16:02:29,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 115 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:29,942 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 257 flow [2024-01-31 16:02:29,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2024-01-31 16:02:29,951 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-01-31 16:02:29,951 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 257 flow [2024-01-31 16:02:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:29,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:29,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:29,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:02:29,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:29,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 6391861, now seen corresponding path program 1 times [2024-01-31 16:02:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214426668] [2024-01-31 16:02:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:02:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214426668] [2024-01-31 16:02:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214426668] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:02:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975567799] [2024-01-31 16:02:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:30,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 147 [2024-01-31 16:02:30,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:30,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:30,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 147 [2024-01-31 16:02:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:02:33,997 INFO L124 PetriNetUnfolderBase]: 20122/39314 cut-off events. [2024-01-31 16:02:33,998 INFO L125 PetriNetUnfolderBase]: For 4579/4579 co-relation queries the response was YES. [2024-01-31 16:02:34,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70740 conditions, 39314 events. 20122/39314 cut-off events. For 4579/4579 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 406708 event pairs, 3021 based on Foata normal form. 1859/38588 useless extension candidates. Maximal degree in co-relation 70721. Up to 23356 conditions per place. [2024-01-31 16:02:34,493 INFO L140 encePairwiseOnDemand]: 143/147 looper letters, 67 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2024-01-31 16:02:34,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 498 flow [2024-01-31 16:02:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:02:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:02:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2024-01-31 16:02:34,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7329931972789115 [2024-01-31 16:02:34,495 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 257 flow. Second operand 4 states and 431 transitions. [2024-01-31 16:02:34,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 498 flow [2024-01-31 16:02:34,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:02:34,505 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 243 flow [2024-01-31 16:02:34,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-01-31 16:02:34,505 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2024-01-31 16:02:34,506 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 243 flow [2024-01-31 16:02:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:34,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:02:34,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:02:34,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:02:34,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thr2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thr2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 52 more)] === [2024-01-31 16:02:34,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:02:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1445662781, now seen corresponding path program 1 times [2024-01-31 16:02:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:02:34,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081163236] [2024-01-31 16:02:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:02:34,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:02:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:02:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:02:34,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:02:34,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081163236] [2024-01-31 16:02:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081163236] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:02:34,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:02:34,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:02:34,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530695466] [2024-01-31 16:02:34,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:02:34,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:02:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:02:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:02:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:02:34,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 147 [2024-01-31 16:02:34,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:02:34,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:02:34,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 147 [2024-01-31 16:02:34,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand